Regarding tank cleaning in tanker design, which statement is accurate?

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Tank cleaning considerations are essential in tanker design because residues and cross-contamination between cargos directly affect product quality, safety, and regulatory compliance. Different cargos have varying properties—viscosity, volatility, corrosion potential, and contamination risk—which means the tank cleaning system must be capable of effectively removing residues, enabling safe transitions, and meeting sanitation standards. This planning influences cleaning methods, equipment (spray balls, pumps, piping), materials, coatings, inerting or ventilation during cleaning, and slop/wash-water handling. When these aspects are integrated into the design, it improves turnaround times, reduces cargo losses, and helps meet industry requirements for sanitation and environmental protection. That’s why describing tank cleaning as an important consideration is the best fit. The other statements are too absolute or restrictive: cleaning is not simply unimportant, and while cargo matters, the design generally prioritizes cleaning as a standard requirement rather than only for some cargos or ships.